If you can get it at a good price, looks like a good starter bike. I think it is from the low end of what you would expect for a decent racing bike, but good to make a start with.
Don't know, but it was probably in the mid £300's to buy new?
Size wise, very difficult to know unless you have a starting point. Some of my club mates are taller than me, but ride smaller bikes. Would be advisable to go into as many bike shops as you can, with a wooden metre rule and start measuring some of the key distances.
- saddle to pedal
- saddle to handle bar
- saddle to brake levers
- handlebar/saddle differential.
I say take a wooden rule, because it makes the dealer think that you know what you are looking for and even if you don't he will give you sensible answers. After a few shop visits, you will know what you are looking for.
When looking at different bikes, it's those key distances above that you need to look for. Frame sizes themselves are miss leading as frame geometry nowadays can be quite different. You can make lots of tweaks buy adjusting/replacing stems and seat posts, but make sure they are not already at the maximum extensions to start with.
Cheers and good luck
Keith